Steel door panel grouping



FIG. 1 is a front view of a steel door panel grouping, the broken lines are for purposes of showing the environment of a door and form no part of the claimed design;

FIG. 2 is a perspective view of thereof; and,

FIG. 3 is a cross-sectional view taken along line 3—3 of FIG. 1. 

The ornamental design for a steel door panel grouping, as shown and described. 